Amir & Cook take three wickets each as Essex reduce Kent to 125-6 on rain-shortened day
Rob Yates hits maiden century for Warwickshire against Somerset
Luke Wood takes 5-67 for bottom club Notts against Yorkshire
Surrey's Rikki Clarke claims five against Hants at The Oval; Vince out for 47
Division Two leaders Lancashire bowl out Glamorgan for 257
Moeen Ali makes 42 as Worcestershire all out for 186 against Northants
Durham's Alex Lees scores 181 against Leicestershire at the Riverside
Sussex's Ollie Robinson takes 8-34 as Middlesex are bowled out for 75
Ryan Higgins claims 'five-for' as Glos dismiss Derbyshire for 200
Hampshire 142-4 v Surrey
Rikki Clarke continues to be the man doing the damage for Surrey as he picks up his third wicket.
Rilee Rossouw managed 18 from 30 balls before hitting a drive straight to Mark Stoneman.
Liam Dawson is the latest to join James Vince at the crease.
Warwickshire 224-2 v Somerset
Michael Perkins
BBC Sport
A superb hundred from Rob Yates.
With most of England, and for that matter Australia, looking for someone who can bat at number three, we might have just found one for some time in the future.
That of course heaps masses of unnecessary pressure on a player who is only 19 years of age but away from the limelight, the Solihull-born left-hander was roared to three figures by the modest crowd as he sent the ball into the leg-side for his first Championship hundred.
The innings was built on an exemplary technique, a good deal of patience and some very skillful strokes too.
Stick his name on the list.
Middlesex 75 v Sussex
Adrian Harms
Sports reporter, BBC Sussex
Time to draw breath at Hove as Middlesex are bundled out in just 21.4 overs on a good wicket
Ollie Robinson was magnificent, bowling line and length and supported by terrific catching, and to crown a wonderful day was awarded his county cap as he left the field at tea.
Hampshire 134-3 v Surrey
The final session of the day is under way at The Oval, with Hampshire adding 26 so far to their 116-3 at tea.
James Vince has progressed to 34 not out and Rilee Rossouw has 18 at the other end.
Warwickshire 214-2 v Somerset
Image source, Getty ImagesRob Yates gives the impression of being quite a modest young man.
No punching the air, no whoop of delight after pushing Craig Overton away for two runs to bring up a maiden century.
Instead the 19-year-old contents himself with wiping the sweat from his brow on his wristband and then raising his bat to acknowledge the applause of the Edgbaston crowd.
What a tremendous innings this has been - lasting 215 balls so far, and including 16 fours.
Kent 36-3 v Essex
Image source, Rex FeaturesNot a happy return to first-class cricket for Sam Billings, who falls in identical fashion to team-mate Sean Dickson after a brief 10-ball appearance at the crease.
Sam Cook was the successful bowler, and he has yet to concede a run from four overs bowled so far.
A first bowling point is in the kitbag for leaders Essex.
Derbyshire 150-8 v Gloucestershire - tea
Gloucestershire are well on top at Derby where Ryan Higgins collected his fifth wicket of the innings by bowling Alex Hughes for 39 with the final ball before tea.
The all-rounder now has 5-46, and the afternoon session also saw loanee Ben Allison pick up his first for the club, trapping Matt Critchley lbw.
Fynn Hudson-Prentice is 29 not out for Derbyshire, who only have Logan van Beek and Ravi Rampaul to come.
Middlesex 75 v Sussex
Will Beer ends Middlesex's 21.4 over first innings at Hove by having Steven Finn lbw for five.
Demolisher-in-chief, though, was Ollie Robinson, whose 8-34 is a career-best display.
This game didn't start until after lunch because of rain - but that has definitely been an afternoon to forget for the visitors.
Durham 254-3 v Leicestershire - tea
Martin Emmerson
BBC Newcastle commentator
Durham have enjoyed the best of day one of their County Championship encounter with Leicestershire and Alex Lees' 147 is his best score for the county - and his third championship century of the season.
He brought up his 100 in 137 balls, with 13 fours, after an opening stand with Cameron Steel worth 75.
He then added 43 for the second wicket with debutant Angus Robson ( a former Leics player) and 77 for the third with Peter Handscomb.
The Aussie is also making hisCchampionship debut for Durham, but fell lbw for 29 to Chris Wright.
Yorkshire 192-7 v Notts - tea
Image source, Rex FeaturesYorkshire have fought back strongly from a precarious morning where Notts had them well and truly on the ropes.
Jonny Tattersall is still at the crease on an unbeaten 81 and it was his partnership with Tim Bresnan (58) that brought the hosts back into the game.
Together they moved the score from 38-5 to 159-6 during the afternoon.
It was Notts' morning but Yorkshire's afternoon.
So, one session each, who will seize the initiative this evening?
Kent 23-2 v Essex
Good line, good length - too good for Sean Dickson.
Sam Cook strikes in his second over as the Kent opener is leg-before, and that's 2-0 so far for the Essex pace bowler.
Sam Billings is the new batsman for the home side, his first Championship innings of the season.
Glamorgan 257 v Lancashire
Nick Webb
BBC Wales Sport
An entertaining two sessions on the North Wales coast, but it’s the visitors on top thanks to four wickets each from Tom Bailey and Danny Lamb, the latter's first victims in first-class cricket.
Glamorgan lost four wickets for six runs in 12 balls in mid-afternoon, only to smash 112 runs for their remaining two wickets.
Samit Patel hit an entertaining 54 on debut, before the last-wicket pair of Lukas Carey (51*) and Michael Hogan (32) hammered the ball around in a stand of 52 in five overs.
Lancashire should still end the day on top on a slow wicket unless we see a further turnaround in momentum in the final session.
Hampshire 116-3 v Surrey - tea
James Vince is unbeaten on 26 and Rilee Rossouw is yet to get off the mark after facing seven balls, as tea is called at the Kia Oval.
Hampshire had been making good progress with only the loss of one wicket, but Rikki Clarke then claimed two victims in five balls to halt their momentum and set-up an interesting evening session.
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Middlesex 50-9 v Sussex
Wonder if Tom Haines feels at all sheepish at denying team-mate Ollie Robinson the chance to take all 10 in the innings?
After being hit for six over mid-wicket by Toby Roland-Jones, the medium-pacer has him caught at second slip from his next delivery.
Whoever is knocking them over, this is an embarrassing afternoon for Middlesex following a delayed start.
Warwickshire 200-2 v Somerset - tea
Another good session for Warwickshire at Edgbaston as they add 95 to their 105-1 at lunch for the loss of Will Rhodes.
He went for 82 after a stand of 153 with Rob Yates, who has equalled his best first-class score by reaching 91 not out at tea.
Sam Hain is playing the supporting role at the other end, with 13 from 70 balls so far.
Middlesex 44-8 v Sussex
Whatever happens now, these will be career-best figures for Ollie Robinson, whose previous best in an innings was 7-23.
Nathan Sowter is the second victim in his latest over as an inside edge is taken by keeper Ben Brown.
From Middlesex's point of view, at least they have beaten their 41 all out against Sussex at Lord's in 1924.
Yorkshire 182-7 v Notts
Luke Fletcher now has his first wicket of the day as he accounts for Keshav Maharaj.
The ball seemed to stay low and skid its way to the stumps to bring Maharaj's innings to an abrupt end.
He scored seven in 14 balls which included a six off the bowling of.... you guessed it, Fletcher.
Revenge.
Hampshire opener Ian Holland, who has just departed for 51 against Surrey, had a fairly unique pathway into the professional world of cricket.
For an entertaining bit of Sunday afternoon reading and not to mention a good story to impress your mates with at the pub, read how Holland has former Australian captain Allan Border to thank for his career in the game.
Image source, Rex FeaturesMiddlesex 42-7 v Sussex
He couldn't, could he?
There's another for Ollie Robinson as an absolute beauty leaves John Simpson off the pitch and clips the top of off stump.
The Sussex all-rounder now has 7-23 from 8.1 overs.
Warwicks 200-2 v Somerset
Warwickshire collect a first batting point as Rob Yates pulls away a short ball from Jack Brooks for four.
It's the young left-hander's 15th boundary so far and carries him to 91 not out - equalling his highest first-class score against Hampshire earlier this season.